(   ) 5. I’ve often        her, but I ’ ve never seen her.

A. listened to    B. heard of

C. hear from      D. listened

(   ) 4. —Look!        boys are playing on the

playground.

—Yes.        them    is    about    200.

A. The number of; A number of

B. The number of; The number of

C. A number of; The number of

D. A number of; A number of

(   ) 3. —Remember to        the lights when you leave the room.

—OK. I will.

A. turn on    B. turn down

C. turn up    D. turn off

(   ) 2. —Have you          a    club?

—Yes, I’m in a swimming club and I often       the    swimming training.

A. joined ; take part in

B. joined ; join

C. taken part in; join

D. taken part in; join in

(   ) 1. Smoking can        lung    cancer. You’d better give it up.

A. work on    B. lead to

C. take away    D. put out

从方框中选择合适的短语填空，每个短语限用一次。

1. She      go    to school on foot, but now

she goes to school by bike.

2. They want to buy the old grange and       it      a    hotel.

3. You must      on sugar to lose weight.

4. He        his    hands         his pocket.

5. Everyone in our class should       keeping the floor clean.

6.       those empty bottles      the dustbin.

7. Many people will take the action necessary to

8. The room is dirty and please help me to       it      .

 The water and the land are thought part of the earth surface (表面）.The air is 1     thought a kind of blanket (毯子）2    the earth. But it is 3      than that. Maybe you have    been in a cave (洞穴） 4     in the earth. Did you    think about the air that was in the cave? The land has some air mixed in it. Air is even mixed    5     the water in the sea. These examples 6        that some air is below the

earth ’ s surface as well as above it.

Men once 7     that there were four basic things from which everything else was made. They 8     these things—earth, fire, air and water the four elements (元素).    9     man made more observations， they 10     that fire was not an element. 11      ,  they  concluded (得出结论）that land, air and water were not elements, 12        . In fact, there are more than    100 elements from 13        scientists believe all things    are made. 14     land, air and water are not elements, they are three main parts of man’s environment (环境）.You will 15     more about them as you study the earth.

(   ) 1. A.    usually    B. hardly

C. never    D. sometimes

(   ) 2. A.    above    B. around

C. across    D. among

(   ) 3. A.    better    B. more

C. less    D. worse

(   ) 4. A wide    B. high

C. Long    D. deep

(   ) 5. A. at    B. in

C. with    D. to

(   ) 6. A. show    B. say

C. have    D. do

(   ) 7. A. found    B. thought

C. knew    D. understood

(   ) 8. A. called    B. told

C. showed    D. said

(   ) 9. A. That    B. For

C. As    D. So

(   ) 10. A. believe    B. planned

C. found    D. want    .

(   ) 11. A.    End    B. Finally

C. Hardly    D. Nearly

(   ) 12. A.    too    B. neither

C. also    D. either

(   ) 13. A.    what    B. who

C. which    D. that

(   ) 14. A.    When    B. As

C. Since    D. Though

(   ) 15. A.    exam    B. decide

C. exercise    D. know

(   ) 6. —What is the       of bike riding?

—It can help cut down air pollution.

A. advantage    B. reason

C. result    D. idea

(   ) 5. —I called you yesterday afternoon. But you were not in.

—Sorry, I       in    the shop with my mother.

A. am    B. will be

C. was    D. have been

(   ) 4. The interesting book     me 10 yuan.

A. spent    B. took

C. paid    D. cost